Slack belt grinding/convex edge

[Marcus]

I just got back from my shop where I`ve been grinding away all morning. I tried some true slack belt grinding today and I`m pretty pleased with it so far. I`ve used the area above the platten already but never removed it entirely before. The only problem is that I find it hard to get crisp edges on the grinds. The blades tend to look as if they`ve been buffed a little too much even before I get to the buffer. Any suggestions? I`ve been putting the platten back in to do the crisper lines. The piece I was working on today for example has a false edge I wanted to be fairly distinct. The primary edge is a convex saber grind. Although I like how a true convex grind cuts I`ve been putting a fine secondary edge on them to make them easier to sharpen. It seems to work pretty well but I`m not sure it`s the best way to go. Would a conventional flat grind be better? Also I`m curious to hear others` thoughts on a convex chisel grind. It seems to me it would beef up the edge on chisel ground blades that have a very fine edge due to the acute angle of the grind. Any merit to this? I`m thinking of using it on the credit card knives I`m making since they`re very thin (1/16"). Marcus